Combined latch and lock



(No Model.)

F. N. PERKINS.

COMBINED LATGH'AND-LOGK.

No; 353,374. Patented Nov. 30, 1886.

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" UNITED STATES PATENT OFFICE.-

FLOYD NIPERKINS, OF CLEVELAND, OHIO.

COMBINED LATCH AND LOCK.

SPECIFICATION forming part of Letters Patent No. 353,374, dated November30 1886.

Application filed April 16, 1886. Serial No. 199,118. (No model.)

To all whom it may concern.-

Be it known that I, FLOYD N. PERKINS, of Cleveland, in the county ofCuyahoga and State of Ohio, have invented a certain new and ImprovedOombined Latch and Lock; and I do hereby declare that the following is afull, clear, and complete description thereof.

My improvement in door-locks consists in the means employed to close upthe key-hole when the door is locked, and also to prevent the movingback of the bolt when the keyhole is closed. The devices for thispurpose consist of a cam lever, which, moved by hand, forces a slideover the key-hole and prevents the entrance of, instruments through saidkey hole to pick and open the lock.

For a more full and detailed description of the said improvementsreference will be had to the following specifications, and to theannexed drawings, making part of the same, in which- Figure 1 is aninterior view of the lock with the top-plate or cover removed. Fig. 2 isan end view, and Fig. 3 is a view showing part'of the interior of thelock and part of the plate or cover.

Like letters designate like partsin the drawings.

The said improvement is represented as being applied to a rim-lock of acertain construction; but it may be used in connection with otherdoor-locks without departing from the nature of the invention.

In the drawings, A is the spring-latch, op-

erated by a spindle, B, passing through the hub of cam B, the spindlebeing provided on' the outside of the lock and door with knobs, in theusual way, for moving the cam B, said latch being jointed at G to thelink D, which link is pivoted to the end of the lever E at F, said leverbeing pivoted to a stud, G. The latch A is moved into its keeper inclosing the door by the action of the spring H, and withdrawn by the camB on turning the knobs, as before stated, in theusual way.

To the lock-bolt I, Figs. 1 and 3, is pivoted at J the tumbler K, whichbolt and tumbler are operated by means of a fitted key in looking andunlocking, in the usual way.

The described devices are arranged within the case L, and covered overby a cap or cover,

M, in the ordinary way.

Having briefly described the mechanism and arrangement of the lock towhich the said improvement is applied, I will now proceed to describethe devices embraced in said improvements.

The cam-lever a is provided with three arms, 0 d 6, attached to a shaft,f,-which shaft has axial or pivotal bearings on each side of thecam-lever, one in the case and the other in the plate covering the case,so that it is pivoted between the two. The arm 0 extends into the slot 9of the slide 71, thehead 13 of which covers over the key-hole when movedforward by the arm 0. The arm (1 is adapted to move in the angle j ofthe stop-slide k, which slide and the slide h are held. in place betweenthe cap M and the lock case by the said arms 0 and d. (Seen in Fig. 3.)

\Vhen the lock is unlocked, as seen in Fig. 1, the latch A and bolt Iare operated in the ordinary way in opening and closing the door, andthe cam-lever a, slide h, and stop-slidek are in the position seen insaid figure, which admits of the latch and bolt being worked in theusual way; but when the latch A and bolt I are moved to the positionseen in Fig. 3, then, by pressing upon the arm 6 tomove it down from theposition in Fig. 1 to that in Fig. 3, the slide his moved forward, sothat the head i will cover the key-hole on both sides of the lock. Atthe same time the arm (2 will force the stop-slide it between the link Dand the end of the case, as shown in Fig. 3.

The position of the head over the key-holes in relation to the case andplate M presents a strong resistance to breakage in attempting to forcean entrance through the key-holes for opening the lock, and theslide-stop is, when moved to the position seen in Fig. 3, effectuallyprevents the latch A from being forced back to open the door.

It will be noted that when the arm 0 is in contact with the slidejr, asseen in Fig. 3, the head i cannot be moved back to uncover the key holesas the end of the slide, in pressing on the end of the arm 0, resiststhe force exerted on the slide by the resistance of the cam-lever axisand their supports in the lock-case, and said slide it cannot be forcedback so long as the arm a is resistant, as seen H in Fig. 3, for thesame cause.

The spring a, Figs. 1 and 3, is for the purpose of preventing thekey-holes from being covered by the slide-head 1;, and said slide isthus prevented from being forced or moved over the key-holes when thedoor is unlocked and the holes are not to be covered over.

The lug at 0 slides up behind the lever E and aids in preventing thelatch A from being forced back when the lock is closed.

What I claim as my invention, and desire to secure by Letters Patent,is-

In a combined latch and lock, the combination, with the spring-latch andthe cam-lever a, having pivotal bearings in the case, and provided witharms a, d, and e, of the slide h,

provided with a head and adapted to be op- 15 erated by said lever tocover the key-hole, and the stop-slide k, also operated by the lever toa position between the lock-case and said latch, when in a lockedposition, to prevent the retraction of the latter, substantially as andfor- 20 the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

FLOYD N. PERKINS,

Witnesses:

J. H. BURRIDGE, O. L. BURRIDGE.

